2 files changed, 4 insertions, 3 deletions
diff --git a/tests/functional/repl_characterization/test-session.cc b/tests/functional/repl_characterization/test-session.cc
index e59064fc5..96f101cdd 100644
--- a/tests/functional/repl_characterization/test-session.cc
+++ b/tests/functional/repl_characterization/test-session.cc
@@ -22,7 +22,7 @@ RunningProcess RunningProcess::start(std::string executable, Strings args)
     procStdout.create();
 
     // This is separate from runProgram2 because we have different IO requirements
-    pid_t pid = startProcess([&]() {
+    auto pid = startProcess([&]() {
         if (dup2(procStdout.writeSide.get(), STDOUT_FILENO) == -1) {
             throw SysError("dupping stdout");
         }
@@ -42,7 +42,7 @@ RunningProcess RunningProcess::start(std::string executable, Strings args)
     procStdin.readSide.close();
 
     return RunningProcess{
-        .pid = pid,
+        .pid = std::move(pid),
         .procStdin = std::move(procStdin),
         .procStdout = std::move(procStdout),
     };
diff --git a/tests/functional/repl_characterization/test-session.hh b/tests/functional/repl_characterization/test-session.hh
index c77cce6d5..a9ba9cf0c 100644
--- a/tests/functional/repl_characterization/test-session.hh
+++ b/tests/functional/repl_characterization/test-session.hh
@@ -7,13 +7,14 @@
 #include <string>
 
 #include "file-descriptor.hh"
+#include "processes.hh"
 #include "tests/terminal-code-eater.hh"
 
 namespace nix {
 
 struct RunningProcess
 {
-    pid_t pid;
+    Pid pid;
     Pipe procStdin;
     Pipe procStdout;